TJ3 SLO-FLO Fill Din 300 Valve and hose assembly

Was just wondering whether anyone has had any experience with this unit. Joe Brancato sells them for a set up on tanks other than what he sells. I have an Omega 75 footer that I would love to be able to regulate the air flow a little bit better. My valve on top sticks somethin terrible and always goes full speed ahead or dead stopped … no middle of the road. Tried the restrictor screw in the valve and it actually made things worse. Anyway, has anybody had some experience with this valve and is it worth $229. Supposedly you get a new 300 Din valve, 40" microbore hose and all the fittings attached. Does anybody know how the restrictor works in the Din valve, how is it different than the one I have that came with the Omega which merely has a small hex head screw that is SUPPOSED to slow the flow? If anybody has some information on the TJ3 SLO-FLO 300 DIN Valve, I'd surely appreciate it. Really don't want to end up with basically the same thing I have now.
 
I have the TJ3 on my tank also it is not just a slow fill but a very slow fill valve. It took forty-five seconds to a minute to fill my Impact 580cc bottle from 100-250bar. Once I cracked the valve, opening it further did not seem to make any difference in the speed it filled. It should be great for filling smaller tanks or guns. It is a treat to use. I have a Ninja slow fill valve on a smaller tank as well it fills several times faster than the Tj3 more like the perfect slow fill speed. Make sure your bottle has the correct threads to match the valve cuz most of the China built tanks have metric 18 x 1.5 threads I believe the TJ3 for larger tanks is 7/8 x 14.